Are you waiting for someone to beg for your "book" answer?
????????
Not at all. Not least because I have absolutely no intention whatsoever of expanding on my opinion! That would be
total speculation on my part. I'm simply saying that anyone (robin and pie) who thinks a twin loses all power ONLY when it runs out of fuel, or both engines are closed down isn't using their imagination, that's all. I haven't said you, or other experienced professionals won't have considered other possibilities!
Personally I don't think either fuel starvation or TR failure is necessarily a good fit with the witness statements or the lack of a successful autorotation!
AIMVHO of course.
A good while yet before we will know any more.